标签: usb打印机

Typicalembeddedapplicationsareratherrestrictedinhowtheycanpresentdatatoauser.LimitedamountsofdatacanbedisplayedonanLCDoragraphicaldis-play,butlargeamountsofdataaremoreproblematical.Often,dataistransferredviaanelectricalinterfaceorviaelectronicstoragemedia,suchasathumbdrive,forfurtherexamination,butitcanbehandytoobtainanimmediatesnapshotofthedata.TheUSBPrinterClass,usedononeofMicrochip’smicrocontrollerswiththeUSBOTGperipheral,allowsanembeddedapplica-tiontoutilizeaUSBprintertoprovidehardcopyoutputforquickreviewandpossiblearchival.AN1233USBPrinterClassonanEmbeddedHostAuthor:KimOttenUSBPRINTERCLASSMicrochipTechnologyInc.The“USBDeviceClassDefinitionforPrintingDevices”specification,availablefromtheUSBImplementersForum,definestheconfiguration,interfaceandINTRODUCTIONendpointdescriptors,aswellasthecommunicationsTypicalembeddedapplicationsareratherrestrictedinprotocolusedtocommun……